Ornamental screw-bolt head



(No Model.)

- H. HIGGIN.

ORNMBNTAL SCREW BOLT HEAD. NGL-369,242. Y Patented Aug. 30, 1887.

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'the end of the boltis headed, to prevent it from headJ which is pierced with a hole and receives UNITED STATES PATENT reines HENRY HIGGIN, OF NEVPORT, KENTUCKY.

ORNAMENTAL SCREW-BOLT HEAD.

SPECIFICATION forming part of Letters Patent No. 369,242, dated August 30, 1887.

Application tiled December' 17, 1886. Serial No. 221,877. (No model.)

To all whom, it may concern:

Be it known that I, HENRY HIGGIN, of Newport, in the county of Campbell and State of Kentucky, have invented certain new and useful Improvements in Ornamental Screwlolt Heads, of which the following is a specin iication.

lily invention relates to an improved screwbolt having an ornamental head. It is primarily adapted to be used as the center bolt of a prop-joint for carriage-tops, and the construction shown is adapted to thatJ use, but it is obvious that it may be applied to many other uses.

The object of my invention is to rigidly attach the ornamental head to the shank or barrel of the screw. In the use of pivot-bolts for carriage-top joints a screw tap or nut is run on the threads chased on the end ot' the bolt, and the tap holds the bolt in position while turning or coming H. Ditliculty is experienced in making an ornamental head and rigidly attaching it to the end of the bolt so that it will not turn in the head when the tap is run on the thread.

My improvement overcomes this difficulty and produces a cheap ornamental screw-bolt, avoiding the use of solder, the construction of which is shown in the accompanying drawings, making a part of this specication, in which Figure 1 is a plan view of the base-plate. Fig. 2 is a sectional elevation of the screw bolt and head attached te the base-plate. Fig. 3is a similar View showing the locking-plate secured to the screw-head and baseplate. Fig. 4 is a modiication ot' Fig. 3, showing the tinishing-plate outside of the locking-plate. Fig. 5 is a sectional elevation of a modied formof ornamental head. Fig. 6 is a similar view of another modification, and Fig. 7 represents a modied form of bolt-head and locking-plate.

The several above views are enlarged beyond the ordinary size used in prop-joints for the purpose of illustrating that construction.

l represents the shank or barrel of a bolt; 2, the head; 3, a slot milled inv the head of the bolt.

4 represents the base-plate of the cap or the stern of the bolt, and it rests against the under side of the head. The outer edge is shown bent or struck up slightly, so as to receive the lap of the inishing-plate.

5 represents thelocking-plate, which is provided with a tinte or corrugation, a., struck in the center of the plate, which nests in the groove 8 of the bolt-head.

In Fig. 3 the plate 5 is doubled at the outer edge over, around, and under plate 4. The lap 6 draws plates 4 and 5 rigidly together and secures them to the head of bolt 2, so that the bolt cannot turn independent of the cap. When it is desired to have theindentation out of sight, I provide an additional plate, 7, to go outside of the plate 5, which latter is made of the same diameter as base-plate 4, and the lap 6 for securing plates 4 and 5together on the bolt-head is formed by turning the edge of plate 7` over, instead of plate 5, as shown in Fig. 3. The depression a in plate 5 is thus hid from view. 8 and 9 represent beads or ornament-ations struck up in plate 7. Sometimes it is desirable to use a leather or other fancy finished covering-plate for the head of the bolt. Such aconstruction is shown in Fig.5.

The plates 4 and 5 are constructed as shown in Fig. 4. 10 represents the ornamental covering of the bolt-head, and the three parts 4, 5, and 10 are secured together by the metal clamp ll, which is compressed by suitable dies upon the peripheraledge ot' the bolt-head.

Fig. 6 represents a modilicatiouof Fig. 3, the only difference being that the under plate, 4, is bent around and lapped upon the top plate, 5, instead of having the top plate lapped over upon the bottom plate.

The object of the slot 8 in the bolt-head and the indentation in the plate, c, is to prevent the head of the bolt f rom turning between the plates 4 and 5, and of course a projection on the bolt-head nesting in a corresponding cavity in plate 5 would accomplish the same re` suit. Fig. 7 represents such a modification with the projection upon the bolt-head and a cavity in the locking-plate 5. This projection is represented as a many-sided boss on the top of the bolt-head, tting in a correspondinglyshaped cavity formed in plate 5, which is preferably covered by plato 7, and the plates secured together, as shown in Fig. 4; but I do not limit Vmyself to the form or number of teats and grooves or projections and cavities formed on the bolt-head and locking-plate 5, each the counterpart of the other and nesting together to prevent the turningvof the bolthead between the plates 4 and 5, as I deem the form shown in Figs. 4 or 5 the best.

It will be observed that the head of the screwbolt is secured by the clamping of the plates 4 5 together, by the overlapping of one plate upon the other, and by the indentation and projection in the head and the plate, respectively. To secure these results the head of the bolt is made large and thick, so that the strain of the two plates shall be sufficient to prevent the head from turning between them, and the indentation and projection are of sufficient distance from the axial center of the bolt to prevent the breaking off of the same. Were the thin metallic plate indented at the center only, the strain upon the circumference of the head would bend or double the plate; but by having the large head, with the nesting projection and indentation, a considerable distance,from the axial center of the bolt this dificulty is avoided.

Having described my invention, I claim as new- An ornamental bolt-head composed of the head 2 and the plates 4 5, embracing the upper and lower sides thereof, and clamped together bythe overlapping of one plate upon t HENRY `HIGGINl Vitnesses:

G. NoUTsnY, ,Roirn ZAHNER. 

